I've been worried about mite infestation lately on my two hives and was curious about a few things on doing a Formic Pro treatment. I had tested a couple of weeks ago with an alcohol wash on both hives and had zero mites on both. I also have three partial (probably closer to filled by now) mediums on top of double deeps on both-bottom supers are wet comb from a harvest last weekend that I put on as our fall flow is just starting and while I don't really need any honey right now, I'd like to have some additional stores for late winter. Both hives appeared very strong with plenty of eggs, brood and bees when opened for the wash. The girls are very hygienic, dead bees are routinely carried off by "undertakers" and over the last two weeks, they've been bringing out dead larvae (3-7 "pieces/parts") in the morning which I thought initially were drone brood (larger bodies) as part of the late summer clean up. This morning an undertaker was struggling to take off with a live bee and crashed near the hives while I was watching them. It appeared to be a deformed wing disease victims, just nubs for wing and I have it in a sample jar I keep near the hive. It was the only one I saw but I know that this is a lagging indicator. The hive hasn't been treated since I pulled the Aviptar strips in early May with the clover flow starting but as I said I had clean washes and no other indicators-reading these forums, I'm worried about a fall mite bomb.
With that, temperatures for the next few days are supposed to be clear-low in the mid sixties, highs near 80. Any issue with chilled brood if I do this (splitting the two brood boxes to place the Formic Pro strips) during the mid day highs? I'm planning on a two strip 14 day treatment tomorrow. I have an OAV wand and was trying to hold off until the fall flow slowes down and do a 4 x 5day treatment with it and a final no brood in late November/early December.
Somebody talk me off the ledge here!